Stove.



E. R. GAHOONE.

STOVE.

APPLIGATION FILED APR.3,1909.

9411 9'74;a Patented Nov. 30, 1909.

2 SHEETS-SHEET 2. AZAZ sage of air to the interior of the fire pot.

EDWIN R. OAI-IOGNE, OF

SUMMIT, NEW JERSEY.

STOVE.

Specification of Letters Patent.

Patented Nov. 30, 1909.

Application filed April 3, 1909. Serial No. 487,774.

T all whom it may concern:

Be it known that I, EDWIN R. CAHOONE, a citizen of the United States,residing at Summit, in the county of Union and State of New Jersey, haveinvented certain new and useful Improvements in Stoves, of which thefollowing is a specification.

This invention relates to improvements in stoves.

The object of the invention is to provide specific means for changingthe draft, that it may be made director indirect, according to the stateof combustion.

The invention also relates to the details of construction, and thespecific arrangement of parts, all of which will be herein afterreferred to and particularly pointed out in the claims.

In the drawings :Figure 1 is a vertical section of my improved stove.Fig. 2, is a horizontal sectionon the line 22, Fig. 1 the grate beingomitted. Fig. 3, is a section on the line 3-3 Fig. 1. Fig. 4, is apartial front elevation. Fig. 5, is a detail side elevation. Fig. 6, isa detail view of a portion of the grate frame and the rear lining. Fig.7, is a detail cross section on line 7'. Fig. 4.

T 1e numeral 1, indicates'a casing, inclosing an ash pit 2, fire pot,oven 4, and the inner draft flues. The fire pot is composed of sections5, corrugated on their inner faces, and having at their lower ends aplurality of fingers 7, and flanges 8, and 9, at their upper ends. Thefront fire pot section 5, is spaced from the front of the casing to forman air passage 10, and is supported by one or more bolts 11. The sideand rear sections have ribs which bear against the casing to properlyspace them to form the air passages. The said front section is formedwith openings 5, to afiord communication be tween the passage 10, andthe interior of the fire pot for the introduction of heated air topromote combustion. A damper 13, is arranged in the stove front oppositepassage 10, for admission of air through openings 13. The side liningsections 5, are spaced from the stove sides, by a series of ribs, andare provided with openings 15, for the pas- The rear lining section 16,terminates a short distance above the grate, and is formed with aplurality of depending fingers 17, formed with seats 18, and is spacedfrom the. oven 4, to provide a passage way 19.

20, indicates the grate, supported in a grate frame 21, mounted in thecasing 1. The grate frame has an extension 22, located di rectly underthe passage way 19, and intermediate this extension and the body of thegrateframe are upwardly projecting fingers 23, reduced at their upperends to fit in the seats 18, of the rear lining. Projecting out wardlyfrom the grate frame and in alinement with the fingers 23, are spacedapart horizontal fingers 24. These horizontal fingers, together withsimilar fingers 25, on the inner front portion of the frame form acontinuation of the grate proper. The upwardly projecting fingers 23,are spaced apart, to provide openings 26, for the passage of theproducts of combustion. These openings 26, are regulated by a slidedamper 27, operating in guideways on the inside of the fingers in thepassageway 19. The eX- tension 22, is also regulated by a slide damper29, operating in ways formed on the extension. These openings 28, may beemployed for a dual purpose I may use them for the introducing of airfrom the ash pit to augment the combustion in the passage way 19, or,they may be used when it is desired to remove the soot or otheraccumulated foreign matter in the bottom of the passageway.

The upper end of the rear lining section is formed with a seat, toreceive the rounded end 30, of a damper 31. Damper 31, is designed toeither close the upper open end of the passageway 19, or cut off theflue 32, from the fire pot. When positioned to out ofi the escapingproducts of combustion from the fire pot the end of the damper abutsagainst a stop 33.

The stove top is disposed above the fire pot and oven, to form an innerdraft flue 32, and at the front is a door 34, having an elongated mouth35, for the introduction of air above the bed of fuel. Fitting over themouth is a slide 36, formed with openings 37, and sliding in Ways 38, onthe door. The door ,is formed at opposite points adj acent the ends ofthe mouth with air inlet openings 39. The damper may be moved in theways to cause the openings therein, and the openings 39, in the door toregister to admit air to the mouth 35. Mica may be placed in the damperto allow the operator to observe the condition of the fire.

Just in rear of the door 34 and in front of the inner draft flue 32, isan air heating chamber 40, abutting against the under side of the stovetop, and being curved on its bottom, and formed in its front edge with aplurality of varying size openings 41, for the introduction of air intothe space formed between the door and the flanges 8, and 9, of the frontlining sections 5. The air heating chamber is preferably supplied withair from the ash pit 2, by two ducts 42, formed at their upper edgeswith seats to receive the bottom of said air heating chamber. The ductsare formed with the side sections 5, to warm the air before reaching thechamber. A hinged depending shield 44, is mounted directly under the airheating chamber, and is provided with a series of fingers 4L5. Thisshield is for the purpose of reducing the width of the space between theair heating chamber and the top of lining sections, to insure of the aircoming through the mouth 35, being deflected downward and thence allowedto rise upward toward the top of the flue. Air may be admitted in thetop of the air heating chamber through openings 4L6, regulated by adamper 47, should the supply from the ash pit not be sufficient.

In the side of the casing is an opening 48, provided with a damper 4:9,to aiford direct communication with the exit flue 50, located on theside of the stove. The inner draft flue extends around the oven andterminates at the partition 51. Near the partition 51, the inner draftflue communicates, by an opening 52, with an extension 53, of the exitflue 50.

In the side of the casing adjacent the bottom of the fire pot and theash pit is an opening 54, in which operates a damper 55. This opening issubstantially the width of the fire pot, and is for the purpose ofdirecting the products of combustion directly to the exit flue. Thedamper 55, has a spindle which extends out through the extension toafford a convenient means of operation.

The partition 51, which forms one wall of the oven, is provided withopenings 58, over which operates a damper 59. By manipulating thedamper, odor and surplus heat, in the oven may escape through the openings to the fire pot, or the exit flue.

As soon as the excessive smoke, incident to making a new fire passesoff, damper 55, may be closed, and the damper 31, turned to close thepassageway 19 and the products of combustion are directed through theinner draft flue 32, to the exit flue. WVhen the parts are in thisposition the structure operates as an up draft stove. If the damper 49,is open, the products of combustion will pass directly to the exit fine,but if it be desired to prolong the retention of the proclucts ofcombustion in the stove, or if the oven is to be heated, damper 4:9, isclosed and the products of combustion will then pass around the oven,and escape to the exit flue through opening 52. The products ofcombustion may be directed downwardly through the fuel, and into thepassageway 19, by operating the damper 31, to cut off the flue 32, fromthe fire pot, and opening the damper 27, and also closing the damper 55.The products of combustion then pass through the openings 26, into thepassageway 19, heated air being added to the bottom of the fire pot fromthe ash pit through the grate. The heated air introduced at this pointincreases the combustion, as the gases pass into the passageway to theflue 32. If the supply of air in the bottom of the fire pot isinsufiicient the damper 29, may be opened, this of course beingregulated according to the conditions.

By the system of dampers described, I provide means for permitting quickescape and burning of the dense smoke when the fire is started, and alsoprovide an economical structure whereby the products of combustion mayescape directly or indirectly to the atmosphere.

The particular construction of the fire pot is of great importance in astove structure of the type described. Air enters the ash pit throughthe dampered openings 60, and necessarily becomes somewhat heated. Inthis state the heated air passes up into fire pot and into the passagesaround the same. Because of the passages being in proximity to the firepot, the air is highly heated, and in this state passes through theopenings 15, and mingles with the rising gases and enhances thecombustion. Part of the air from the ash pit passes up through the bodyof fuel, and part up through the passages so that when the products ofcombustion reach the fine, the various streams of air are intermingledwhich produces a very high grade of combustion. Mingled with the heatedair from the ash pit is the air introduced in the passage 10, throughthe openings 13. Then as the mingled air and gases arise in the firepot, a supply of varying streams of heated air is introduced theretofrom the air heating chamber to.

WVhat I claim is:

1. In a stove, the combination with a casing, a fire pot spaced from thecasing to provide passages, the passages on the sides and front beingclosed at the upper ends and open at the bottoms, and communicating withthe fire pot, an oven spaced from the top, rear and bottom of the casingand the rear of the fire pot, the space at the rear of the fire potcommunicating with the bottom of said fire pot, and the space at the topand rear and bottom of the oven forming an inner draft flue whichcommunicates with the fire pot and the space in rear of the latter, an

ash pit below and communicating with the passages and fire pot, meansfor admitting air to the ash pit; an exit flue having an extensionformed with an opening which communicates with the ash pit, the exitflue communicating with the inner draft fiue at a point above the firepot, a damper controlling the opening above the fire pot, a damper atthe junction of the inner draft flue, and the passage at the rear of thefire pot to control the escape of the products of combustion, and adamper controlling the opening between the ash pit and extension.

2. In a stove, the combination with a casing, a fire pot spaced from thecasing to form passages said passages on the front and sides of the firepot communicating with the latter at the bottom and are closed at theirupper ends, the passage at the rear of the fire pot communicating withthe bottom of the latter and an inner draft flue, an ash pit, an innerdraft flue formed in part by the casing and communicating with the topof the fire pot, an exit flue communicating with the ash pit and withthe inner draft flue, a door adjacent the draft flue, means forintroducing a regulated supply of air through the door, an air heatingchamber adjacent the door and above the fire pot, said air heatingchamber having openings to introduce streams of air toward the door,ducts communicating with the ash pit and the air heating chamber, saidducts directing air from the ash pit to the chamber, means forintroducing air to the ash pit, means for introducing air to the passageadjacent the front of the fire pot, and a damper above the fire pot forregulating the passage of the products of combustion from the innerdraft fine to the exit fiue.

3. In a stove, the combination with a casing, an ash pit, an exit flue,a fire pot spaced from the casing to form air heating passages, saidfire pot having openings to afford communication between the passagesand the interior of the fire pot, an air heating chamber located abovethe fire pot and formed with exit openings, ducts communicating with theash pit and the air heating chamber to supply air to the latter, aswinging shield suspended from the air heating chamber, means forintroducing air to the fire pot in front of the air heating chamber,means for causing the products of combustion to pass down through thefuel, to the exit flue, or upwardly through the fuel to the exit flue.

l. In a stove, the combination with a casing, formed with an openingbelow the fire pot, a fire pot spaced from the casing to providepassages around the fire pot, said passages communicating with the firepot at their lower ends, the passage formed in the rear of the fire potbeing open at the top, an ash pit below and communicating with thepassages and fire pot, means for admitting air to the ash pit, an innerdraft flue formed in part by the casing and communicating withthe top ofthe fire pot, a damper above the fire pot, said damper being positionedto cut off communication of the inner draft fine, and the fire pot, orthe top of the passage back of the fire pot from said inner draft fiue,an exit flue communicating with the inner draft fiue above the fire potby an opening formed in the casing, a damper controlling said opening,and a damper cooperating with the opening in the casing below the firepot to control the exit of the products of combustion to the exit flue.

5. In a stove, the combination with a casing, an oven, spaced from thecasing to form an inner draft flue, a fire pot spaced from the oven toform a passageway the lower end of the fire pot which is spaced from theoven having a plurality of spaced apart fingers, the spaces between thefingers forming openings between the fire pot and the passageway theinner draft fiue communicating with the fire pot and the passageway, adamper for directing the products of combustion from the fire pot to theinner draft fine or downwardly through the openings at the bottom of thefire pot into the passageway to the inner draft flue, means forintroducing air to the bottom of the fire pot adjacent the openingsleading into the passageway, and means for introducing streams of heatedair to the sides of the fire pot.

G. In a stove, the combination, with a casing an oven spaced from thecasing to form an inner draft flue a fire pot spaced from the oven toform a passageway which communicates with the bottom of the'fire pot, aframe in the bottom of the fire pot, said frame having openings in linewith the passageway, a damper cooperating with said openings, a gratemounted in the frame, spaced fingers formed at the lower rear portion ofthe fire pot adjacent the openings in said frame, an exit flue whichcommunicates with the inner draft flue through an opening formed in thecasing, a damper to regulate the said opening, a damper to direct theproducts of combustion from the fire pot to the inner draft flue, ordownwardly in the fire pot to the passageway, and means for introducingheated air to the bottom of the fire pot.

7. In a stove the combination with a casing, an oven, spaced from thecasing to form an inner draft fine, a fire pot having spaced fingers atthe lower rear portion and the wall above said fingers being spaced fromthe oven to form a passageway, which communicates with the bottom of thefire pot, an exit flue communicating with the inner draft flue by twoopenings in the casing, one of said openings being above the fire potand the other said opening being below the fire pot, a damper in theupper opening, a damper adjacent the inner draft flue to shut off directcommunication with the fire pot or close the upper end of thepassageway, a

damper at the lower end of the passageway to control the passage of theproducts of combustion entering the bottom thereof, through the spacesformed between the fingers, an ash pit, and means for supplying air tothe ash pit, said air passing through the bottom of the fire pot andmingling with the products of combustion therein.

8. In a stove, the combination with a casing, formed with an openingadjacent the bottom of the fire pot, an oven spaced from the casing toform an inner draft flue, a fire pot having one wall spaced from theoven to form a passageway, which communicates with the bottom of thefire pot, an exit flue communicating with the inner draft flue by twoopenings in the casing, one of said openings being above the fire pot,and the other said opening being below the fire pot, a damper in theupper opening, a damper located adjacent the inner draft flue to shutoff direct communication with the fire pot or close the upper end of thepassageway a damper at the lower end of the passageway to control thepassage of the products of combustion entering the bottom thereof, anash pit having an opening in its side wall, and means for supplying airto the ash pit, said air passing through the bottom of the fire pot andmingling with the products of combustion therein, and an extension onthe exit flue which communicates with the opening in the casing adjacentthe bottom of the fire pot, and a damper in said opening to control thepassage of the products of combustion passing to the exit flue.

9. In a stove, the combination with a casing, an oven, spaced from thecasing to form an inner draft flue, a fire pot having one of itswalls'spaced from the oven to form a passageway, a frame in the bottomof the fire pot with openings adjacent the passageway, said frame havingspaced fingers between the grate and the openings in the frame a gratesupported in the frame, the spaced wall of the fire pot being supportedon the spaced fingers of the frame, a damper controlling the spacesformed between the fingers, a damper controlling the openings in theframe in the rear of the fingers, a damper at the upper end of thepassageway to shut off the inner draft flue from direct communicationwith the fire pot or close the upper end of the passageway, means forintroducing air to the bottom of the fuel in the fire pot, an exit fluecommunicating with the inner draft flue by an opening formed in thecasing, and a damper in said opening.

10. In a stove, the combination with a casing, a fire pot having spacedfingers at the lower end of the rear portion, an oven spaced from therear wall of the fire pot to provide a passageway the products ofcombustion when passing through the passageway contacting directly withthe wall of the oven, said oven being also spaced from the casing toform an inner draft flue which communicates with the fire pot andpassageway, the spaces between the fingers forming openings to affordcommunication between the fire pot and passageway, a damper fordirecting the products of combustion from the fire pot to the innerdraft flue or downwardly through the fire pot and openings between thefingers to the passageway and thence to the inner draft flue, means forintroducing air to the bottom of the fire pot adjacent the openingsformed by the fingers, and means for introducing streams of air to thefront and sides of the fire pot above the level of the said openings,and means above the aforesaid means for introducing air downwardlytoward the fuel in the fire pot.

11. In a stove, the combination with a casing having an opening abovethe fire pot and an opening adjacent the bottom of the fire pot and ashpit, an oven spaced from the casing to form an inner draft flue, a firepot spaced from the oven to form a passageway, the lower end of the firepot which is spaced from the oven having a plurality of spaced apartfingers, the spaces between the fingers forming openings between thefire pot and the passageway, the inner draft flue communicating with thefire pot and the passageway, a damper for directing the products ofcombustion from the fire pot to the inner draft flue or downwardlythrough the openings at the bottom of the fire pot into the passagewayto the inner draft flue, means for introducing air to the bottom of thefire pot said air passing into the fire pot and to the openings leadinginto the passageway, an exit fine having an extension, the extensioncommunicating with the opening adjacent to the fire box and ash pit, theexit flue communicating with the inner draft flue by the opening in thecasing above the fire pot, and a damper for controlling the latteropening.

In testimony whereof I aflix my signature in presence of two witnesses.

EDIVIN R. CAHOONE.

Witnesses:

Sana M. FLEMING, Evnnn'r'r T. SPINNING.

